code: def testEmpty(self):
      x = np.random.randint(2, size=0)
      y, idx = array_ops.unique(x)
      tf_y, tf_idx = self.evaluate([y, idx])
  
      self.assertEqual(len(x), len(tf_idx))
      self.assertEqual(len(tf_y), len(np.unique(x)))
  
imports: import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 9 for calling the UniqueTest obj's underlying member method code with example usage: obj.testEmpty() without return types